Home / 20,816.25-28,726.53-11,384.79

Finding the Fourth Proportional to 20,816.25, 28,726.53 and 11,384.79

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Solution

The fourth proportional to 20,816.25, 28,726.53 and 11,384.79 is: 15,711.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.25 : 28,726.53 = 11,384.79 : x
  2. Step 2: Convert to fraction form
    20,816.25/28,726.53 = 11,384.79/x
  3. Step 3: Cross multiply
    20,816.25x = 28,726.53 × 11,384.79
  4. Step 4: Simplify right side
    20,816.25x = 327,045,511.48
  5. Step 5: Solve for x
    x = 327,045,511.48/20,816.25
  6. Step 6: Final answer
    x = 15,711.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.